952 MOSQUITOES OF NORTH AMERICA 



nut-brown, nude. Pleurae and coxse dark brovm, densely clothed with silver 

 scales with a slight yellowish tinge. 



Abdomen depressed, broadest at middle ; dorsal vestiture metallic blue with a 

 greenish tinge basally and a deeper blue towards the tip, shading into violet on 

 eighth segment ; segments with rather small brassy lateral spots at hind angles ; 

 first segment brilliant blue scaled in the middle, silvery blue at the sides ; venter 

 clothed with brassy scales, a median longitudinal dark metallic blue line to tip 

 of seventh segment; last segment with yellowish terminal bristles. No caudd 

 tufts. 



Wings narrow, with a slight smoky tinge ; basal cross-vein oblique, reaching 

 fourth vein beyond anterior cross-vein; costal vein purple sealed. Halteres 

 pale, with black silver scaled knobs. 



Legs slender; vestiture nearly black with blue and purple reflections ; femora 

 brassy beneath ; front tibiae dull golden on the outer side ; middle tibiae golden 

 on inner side; front and middle tarsi with second segment and part of third 

 silvery white; hind tarsi with fourth and basal two-thirds of fifth segments" 

 silvery-white. Claw formula, 0.0-0.0-0.0. 



Length : Body 8 to 9 mm. ; wing 7 mm. 



Male. — Proboscis rather long, curved, tapering to a point. Palpi long and 

 stout, slightly longer than the proboscis ; long joint stout, about two-fifths the 

 length of the entire palpus, with a false articulation before middle, its apex 

 somewhat dilated ; penultimate joint more than half the length of long joint, 

 stout, somewhat compressed and slightly thickened at apex; terminal joint 

 long, slender, slightly curved and tapering to a point, about equal to long joint ; 

 vestiture of all but the last joint of brilliant purple, brassy and blue scales, 

 the darker scales massed at bases and apices of joints and around false articu- 

 lation of long joint, extreme apices pale lilac ; terminal joint very dark, purplish. 

 Antennae stout, densely plumose; last two joints long and slender, the others 

 short and stout, subequal, brownish; second joint long, more than twice the 

 length of the succeeding one, with a dense dorsal crest of erect silvery and purple 

 scales ; hairs of whorls dense, long, blackish ; tori black with silvery pruinosity. 

 Clypeus transverse, broadly rounded at the sides and slightly produced at 

 middle; dark brown with sUvery pruinosity. Occiput clothed with brilliant 

 coppery and blue iridescent scales, ocular margin bluish-silvery; cheeks and 

 head beneath silvery scaled. Prothoracic lobes prominent, brilliant blue and 

 purple sealed and with a few coarse black hairs. Mesonotum clothed on the disk 

 with brown scales with numerous bronzy ones intermixed, posteriorly a mixture 

 of bronzy and blue scales; a median stripe and broad ones on lateral margins 

 involving anterior angles light blue and well defined ; patches of brilliant blue 

 scales over roots of wings. Scutellum brilliant blue scaled in the middle, margin 

 and sides, silvery-blue; in one specimen some patches of bronzy scales on its 

 disk. Abdomen depressed, rather slender, hardly broadened apically; dorsal 

 vestiture of deep blue scales shading into violet-red on sixth, seventh, and 

 eighth segments, sides of segments with yellowish-silvery spots, which are large 

 and apical on sixth and seventh segments ; sixth, seventii, and eighth segments 

 finely margined behind with golden scales ; venter pale-golden scaled, with a 

 median steel-blue stripe, moderately broad to apex of fifth segment and very 

 narrow on sixth and seventh segments, eighth segment violet-red; claspers 

 covered with dark purple scales ; lateral ciliation moderate, pale yellow, coarser 

 and black on the eighth segment. Wings narrow, slightly smoky, particularly 

 along front margin; basal cross- vein oblique and reaching fourth vein at or 

 beyond anterior cross-vein. Legs nearly black, with violet and blue reflections ; 

 femora brassy beneath, knees silvery-white ; front tibiae with dull golden scales 



